Sampling equipment for roadbed and pavement compactness detection

Abstract

The invention provides sampling equipment for roadbed and pavement compactness detection. The sampling equipment for roadbed and pavement compactness detection comprises a chassis, four wheels are fixedly mounted at the bottom of the chassis, a bearing plate is fixedly mounted at the top of the chassis through a frame box, two handles are fixedly mounted on one side of the frame box, and the sampling equipment further comprises a lifting mechanism fixedly mounted at the top of the bearing plate. According to the sampling equipment for roadbed and pavement compactness detection, the lifting motor drives the sampling mechanism to ascend and descend, the sampling motor rotates to drive the drill bit to rotate for sampling, the three trays rotate to subpackage three layers of different samples, and the three different layers of samples are detected respectively; detection failure caused by errors generated by compaction degree detection of the mixed samples is avoided, the air cylinder is arranged to drive the push disc to push out the samples, the samples are pushed out completely, detection errors caused by residues are avoided, and workers can take out the samples conveniently through the sampling opening.

Description

Technical Field

[0001] The invention relates to the field of road surface compaction detection sampling, and in particular to a sampling device for roadbed and road surface compaction detection. Background Art

[0002] The compaction of roadbed and pavement is the core indicator for measuring road quality. The roadbed is commonly composed of three layers: surface layer, base layer and subbase layer. Insufficient compaction of roadbed and pavement will lead to pavement settlement, cracking, mud pumping and other defects. Therefore, the specification requires strict testing of compaction. Sampling is the key link in compaction testing. By obtaining representative samples and measuring their dry density, the compaction is calculated by comparing with the maximum dry density. Commonly used testing methods include the knife ring method, sand injection method, nuclear density meter method, etc. Among them, the knife ring method is the most commonly used compaction test method today.

[0003] The existing sampling equipment for roadbed and pavement compaction detection uses a hydraulic cylinder to drive the sampling mechanism up and down, and a motor to rotate and drive the drill bit to cut and sample the road soil. After sampling, the staff removes the sample soil and detects the compaction degree.

[0004] However, existing equipment only samples the surface layer of the road surface. The roadbed and pavement usually have three layers. If only one sampling is performed and then the samples are mixed, the compaction test will be distorted. The standards of different layers are not consistent, resulting in test failure.

[0005] Therefore, it is necessary to provide a sampling device for detecting the compaction of roadbed and pavement to solve the above technical problems. Summary of the Invention

[0006] The present invention provides a sampling device for detecting the compaction degree of a roadbed and a pavement, which solves the problem of detection failure caused by not sampling and packaging the roadbed and the pavement in layers before detection.

[0007] To solve the above technical problems, the present invention provides a sampling device for detecting the compaction degree of roadbed and pavement, comprising a chassis, four wheels fixedly mounted on the bottom of the chassis, a carrying plate fixedly mounted on the top of the chassis via a frame box, two handles fixedly mounted on one side of the frame box, and a lifting mechanism fixedly mounted on the top of the carrying plate;

[0008] A sampling mechanism, wherein the sampling mechanism is fixedly mounted on the bottom of the lifting mechanism, the sampling mechanism comprises a motor cylinder, the motor cylinder is fixedly mounted on the bottom of the lifting mechanism, a sampling motor is fixedly mounted on the top of the inner wall of the motor cylinder, the output shaft of the sampling motor passes through the bottom of the motor cylinder and extends to the outside, the output shaft of the sampling motor is fixedly connected to the sampling cylinder, a cylinder is fixedly mounted on the top of the inner wall of the sampling cylinder, a push plate is fixedly mounted on the output end of the cylinder, a drill bit is fixedly mounted on the bottom of the sampling cylinder, and openings for the drill bit to pass through are provided on the surfaces of the chassis and the bearing plate, and the lifting mechanism is used to drive the motor cylinder to lift and reciprocate;

[0009] A sample storage mechanism is rotatably mounted inside the supporting plate. The sample storage mechanism includes a sample storage shaft, which is rotatably mounted inside the supporting plate. A rotating column is fixedly mounted on the top end of the sample storage shaft, and a bottom end of the sample storage shaft is rotatably mounted inside the chassis. Three trays are fixedly mounted on the surface of the sample storage shaft via a bracket.

[0010] Preferably, the lifting mechanism includes a lifting motor, which is fixedly mounted on the top of the supporting plate, and the output shaft of the lifting motor is fixedly connected to a screw, and the screw is slidably connected to an auxiliary rod through the lifting plate, and the auxiliary rod is fixedly mounted on the top of the supporting plate, and the screw is threadedly connected to the lifting plate, and the auxiliary rod is slidably connected to the lifting plate, and the top of the screw is fixedly mounted on the top of the supporting plate through a rotating frame, and the bottom of the lifting plate is fixedly mounted to the top of the motor barrel.

[0011] Preferably, a sampling port is provided on one side of the frame box, and the sampling port is used for staff to take out samples.

[0012] Preferably, a driving mechanism is fixedly installed on the top of the supporting plate, and the driving mechanism includes a pillar, which is fixedly installed on the top of the supporting plate. A sliding groove is provided on the surface of the pillar, and the sliding groove is slidably connected to a slider through a connecting column. A first pawl and a second pawl are rotatably installed on both sides of the slider through two rotating shafts, and a tension spring is arranged between the first pawl and the second pawl.

[0013] Preferably, a transmission mechanism is fixedly installed on the top of the supporting plate, and the transmission mechanism includes a transmission shaft, and the transmission shaft is fixedly installed on the top of the supporting plate through a rotating frame. A ratchet is fixedly installed on the right end of the transmission shaft, and the ratchet is engaged with the first pawl and the second pawl. A first bevel gear is fixedly installed on the left end of the transmission shaft, and a second bevel gear is fixedly installed on the surface of the rotating column, and the first bevel gear is engaged with the second bevel gear.

[0014] Preferably, a fixing plate is fixedly mounted on the surface of the sampling cylinder, and the fixing plate is fixedly connected to a push column via a compression spring.

[0015] Preferably, the pushing end of the pushing column is semi-spherical, and the pushing column is adapted to be installed with the connecting column.

[0016] Preferably, two limiting members are symmetrically fixedly mounted on the bottom of the supporting plate, and the two limiting members are adapted to be mounted on the drill bit and the sampling cylinder.

[0017] Preferably, six pneumatic suction cups are symmetrically fixedly installed on the bottom of the chassis, and the pneumatic suction cups are raised and lowered by telescopic rods.

[0018] Preferably, a through hole is opened inside the sample storage shaft, and a probe mechanism is fixedly installed on the top of the inner wall of the sample storage shaft. The probe mechanism includes a screw rod, and the screw rod is fixedly installed on the top of the inner wall of the sample storage shaft. The surface of the screw rod is threadedly connected to a connecting block, and the connecting block is fixedly connected to the probe through four fixing columns.

[0019] Compared with related technologies, the sampling equipment for detecting the compaction of roadbed and pavement provided by the present invention has the following beneficial effects:

[0020] The present invention provides a sampling device for testing the compaction of roadbed and pavement. The sampling mechanism is lifted and lowered by a lifting motor, and the rotation of the sampling motor drives the drill bit to rotate for sampling. Three trays are rotated to pack three layers of different samples, and the samples of the three different layers are tested separately to avoid errors in compaction testing of mixed samples that may lead to test failure. A cylinder is provided to drive a push plate to push out the sample, so that the sample is completely pushed out to avoid detection errors caused by residues. The sampling port is provided to facilitate staff to take out samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a preferred embodiment of a sampling device for detecting the compaction of a roadbed and pavement provided by the present invention;

[0022] Figure 2 for Figure 1 Another structural schematic diagram of a sampling device for detecting the compaction of a roadbed and pavement is shown;

[0023] Figure 3 for Figure 2 The schematic diagram of the structure of the sampling mechanism shown;

[0024] Figure 4 for Figure 2 The structural diagram of the lifting mechanism shown;

[0025] Figure 5 for Figure 2The structural diagram of the sample storage mechanism shown;

[0026] Figure 6 This is a schematic structural diagram of a second embodiment of a sampling device for detecting roadbed and pavement compaction;

[0027] Figure 7 for Figure 6 Schematic diagram of the installation of the driving mechanism shown;

[0028] Figure 8 for Figure 7 Schematic diagram of the installation of the transmission mechanism shown;

[0029] Figure 9 for Figure 8 An enlarged schematic diagram of section A is shown;

[0030] Figure 10 for Figure 7 The installation diagram of the pneumatic suction cup shown;

[0031] Figure 11 for Figure 7 An enlarged schematic diagram of portion B is shown;

[0032] Figure 12 This is a schematic diagram of the installation of the connecting column;

[0033] Figure 13 for Figure 7 Schematic diagram of the structure of the probe mechanism shown.

[0034] Numbers in the figure: 1, chassis, 2, frame box, 3, carrying plate, 4, sampling mechanism, 401, motor cylinder, 402, sampling motor, 403, sampling cylinder, 404, cylinder, 405, push plate, 406, drill bit, 5, lifting mechanism, 501, lifting motor, 502, screw, 503, lifting plate, 504, auxiliary rod, 6, driving mechanism, 601, pillar, 602, slide, 603, slider, 604, first pawl, 605, second pawl, 606, stretching spring Spring, 607, connecting column, 7, transmission mechanism, 701, transmission shaft, 702, ratchet, 703, first bevel gear, 704, second bevel gear, 8, sample storage mechanism, 801, sample storage shaft, 802, rotating column, 803, tray, 9, probe mechanism, 901, screw rod, 902, connecting block, 903, probe, 10, limiter, 11, wheel, 12, pneumatic suction cup, 13, handle, 14, fixing plate, 15, compression spring, 16, push column, 17, sampling port. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] First embodiment

[0037] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 A sampling device for testing the compaction of roadbed and pavement, comprising a chassis 1, four wheels 11 fixedly mounted on the bottom of the chassis 1, a carrying plate 3 fixedly mounted on the top of the chassis 1 via a frame box 2, two handles 13 fixedly mounted on one side of the frame box 2, and a lifting mechanism 5 fixedly mounted on the top of the carrying plate 3;

[0038] The sampling mechanism 4 is fixedly mounted on the bottom of the lifting mechanism 5. The sampling mechanism 4 includes a motor cylinder 401, which is fixedly mounted on the bottom of the lifting mechanism 5. A sampling motor 402 is fixedly mounted on the top of the inner wall of the motor cylinder 401. The output shaft of the sampling motor 402 passes through the bottom of the motor cylinder 401 and extends to the outside. The output shaft of the sampling motor 402 is fixedly connected to a sampling cylinder 403. A cylinder 404 is fixedly mounted on the top of the inner wall of the sampling cylinder 403. A push plate 405 is fixedly mounted on the output end of the cylinder 404. A drill bit 406 is fixedly mounted on the bottom of the sampling cylinder 403. The surfaces of the chassis 1 and the carrying plate 3 are provided with openings for the drill bit 406 to pass through. The lifting mechanism 5 is used to drive the motor cylinder 401 to lift and reciprocate.

[0039] The sample storage mechanism 8 is rotatably mounted inside the supporting plate 3. The sample storage mechanism 8 includes a sample storage shaft 801. The sample storage shaft 801 is rotatably mounted inside the supporting plate 3. A rotating column 802 is fixedly mounted on the top end of the sample storage shaft 801. The bottom end of the sample storage shaft 801 is rotatably mounted inside the chassis 1. Three trays 803 are fixedly mounted on the surface of the sample storage shaft 801 through a bracket.

[0040] The lifting mechanism 5 includes a lifting motor 501, which is fixedly installed on the top of the supporting plate 3. The output shaft of the lifting motor 501 is fixedly connected to a screw 502, and the screw 502 is slidably connected to an auxiliary rod 504 through a lifting plate 503. The auxiliary rod 504 is fixedly installed on the top of the supporting plate 3. The screw 502 is threadedly connected to the lifting plate 503, and the auxiliary rod 504 is slidably connected to the lifting plate 503. The top end of the screw 502 is fixedly installed on the top of the supporting plate 3 through a rotating frame, and the bottom of the lifting plate 503 is fixedly installed on the top of the motor cylinder 401.

[0041] A sampling port 17 is provided on one side of the frame box 2 , and the sampling port 17 is used for staff to take out samples.

[0042] During actual use, the three trays 803 are spaced 120° apart; the trays 803 are located below the drill bit 406 in the initial position; the bottom end of the drill bit 406 is a serrated blade; the motor cylinder 401 does not contact the sampling cylinder 403; the push plate 405 is adapted and installed to fit the sampling cylinder 403.

[0043] The working principle of the sampling device for roadbed and pavement compaction detection provided by the present invention is as follows:

[0044] First, the staff pushes the handle 13 to cooperate with the wheel 11 to move the equipment, and stops when it reaches the position where sampling and testing are required.

[0045] Then, the tray 803 is driven to rotate counterclockwise by 60° by manually rotating the rotating column 802, and the tray 803 leaves the bottom of the drill bit 406. The lifting motor 501 is started to drive the screw 502 to rotate. The screw 502 is threadedly connected to the lifting plate 503. During the descent of the lifting plate 503, the other end is slidably connected to the auxiliary rod 504. The lifting plate 503 drives the motor barrel 401 to descend. When the drill bit 406 passes through the chassis 1, the sampling motor 402 is started to drive the drill bit 406 to rotate through the sampling barrel 403 for sampling. Sampling is performed during the process of rotating and descending. After obtaining the surface layer sample, the sampling motor 402 is turned off.

[0046] Then, the lifting motor 501 starts to reverse, driving the sampling mechanism 4 to reset. After the reset is completed, the staff rotates the tray 803 counterclockwise by 60° again to the bottom of the drill bit 406 and then stops. At this time, the cylinder 404 is started to push the push plate 405 to push the sample into the interior of the tray 803.

[0047] Finally, the above process can be repeated to continue to obtain samples of the base layer and subbase layer and place them in the tray 803. During the rotation of the tray 803, the tray 803 will pass through the sampling port 17. The staff can take samples from the sampling port 17, package and preserve them, and then conduct compaction tests on three different layers of roadbed and pavement in the laboratory.

[0048] Compared with related technologies, the sampling equipment for detecting the compaction of roadbed and pavement provided by the present invention has the following beneficial effects:

[0049] The sampling mechanism 4 is lifted and lowered by the lifting motor 501, and the sampling motor 402 rotates to drive the drill bit 406 to rotate for sampling. The three trays 803 are rotated to pack three layers of different samples, and the samples of the three different layers are tested separately to avoid errors in compaction testing of mixed samples that may lead to test failure. The cylinder 404 is provided to drive the push plate 405 to push out the sample, so that the sample is completely pushed out to avoid detection errors caused by residues. The sampling port 17 is provided to facilitate staff to take out samples.

[0050] Second embodiment

[0051] Please refer to Figure 6-Figure 13 Based on the sampling device for detecting the compaction of roadbed and pavement provided in the first embodiment of this application, the second embodiment of this application provides another sampling device for detecting the compaction of roadbed and pavement. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0052] Specifically, the difference of the sampling equipment for detecting the compaction of roadbed and pavement provided in the second embodiment of the present application is that a driving mechanism 6 is fixedly installed on the top of the supporting plate 3, and the driving mechanism 6 includes a pillar 601, and the pillar 601 is fixedly installed on the top of the supporting plate 3. A slide groove 602 is provided on the surface of the pillar 601, and the slide groove 602 is slidingly connected to a slider 603 through a connecting column 607. The two sides of the slider 603 are respectively rotatably installed with a first pawl 604 and a second pawl 605 through two rotating shafts, and a tension spring 606 is arranged between the first pawl 604 and the second pawl 605.

[0053] A transmission mechanism 7 is fixedly installed on the top of the supporting plate 3, and the transmission mechanism 7 includes a transmission shaft 701, and the transmission shaft 701 is fixedly installed on the top of the supporting plate 3 through a rotating frame. A ratchet 702 is fixedly installed on the right end of the transmission shaft 701, and the ratchet 702 is engaged with the first pawl 604 and the second pawl 605. A first bevel gear 703 is fixedly installed on the left end of the transmission shaft 701, and a second bevel gear 704 is fixedly installed on the surface of the rotating column 802, and the first bevel gear 703 is engaged with the second bevel gear 704.

[0054] A fixing plate 14 is fixedly mounted on the surface of the sampling cylinder 403 , and the fixing plate 14 is fixedly connected to a push column 16 via a compression spring 15 .

[0055] The pushing end of the pushing column 16 is semi-spherical, and the pushing column 16 is adapted to be installed with the connecting column 607 .

[0056] Two limiting members 10 are symmetrically fixedly installed on the bottom of the supporting plate 3 , and the two limiting members 10 are adapted to be installed with the drill bit 406 and the sampling tube 403 .

[0057] Six pneumatic suction cups 12 are symmetrically fixedly installed on the bottom of the chassis 1, and the pneumatic suction cups 12 are raised and lowered by telescopic rods.

[0058] A through hole is opened inside the sample storage shaft 801, and a probe mechanism 9 is fixedly installed on the top of the inner wall of the sample storage shaft 801. The probe mechanism 9 includes a screw rod 901, and the screw rod 901 is fixedly installed on the top of the inner wall of the sample storage shaft 801. The surface of the screw rod 901 is threadedly connected to a connecting block 902, and the connecting block 902 is fixedly connected to the probe 903 through four fixing columns.

[0059] During actual use, the pneumatic suction cup 12 is connected to the bottom of the chassis 1 through a telescopic rod, and the pneumatic suction cup 12 is provided with a vacuum generator; the drill bit 406 is located below the supporting plate 3 when in the initial position, and the initial position is also the position where the cylinder 404 pushes the sample into the tray 803 after the sampling is completed; the limiter 10 stabilizes the drill bit 406 and the sampling tube 403 through the set compression spring; the probe 903 does not contact the bottom end of the screw rod 901 in the initial position, nor does it contact the ground in the initial position; a micro-hole drill needle is arranged inside the probe 903; the slider 603 will not drop when it is at the highest point.

[0060] The working principle of the sampling device for detecting the compaction of roadbed and pavement provided in this embodiment is as follows:

[0061] First, when the equipment moves to the position where sampling and testing are required, the pneumatic suction cup 12 is lowered to contact the road surface and then works. When the equipment is sampling, the whole is stabilized to avoid shaking. The two limit members 10 are used to stabilize the drill bit 406 to avoid shaking when the cylinder 404 pushes the sample into the tray 803. When the sampling mechanism 4 descends for sampling, the limit member 10 limits the sampling tube 403 to avoid shaking during the sampling process.

[0062] Then, during the descending process of the sampling cylinder 403, the fixed plate 14 fixed on the surface of the sampling cylinder 403 drives the pushing column 16 to descend through the compression spring 15. During the descending process, the pushing column 16 contacts the connecting column 607. After pushing the connecting column 607 to the bottom of the slide groove 602, the pushing column 16 disengages and drives the slider 603 to descend by pressing down the connecting column 607. The slider 603 drives the first pawl 604 and the second pawl 605 to descend. During this process, the second pawl 605 engages with the ratchet 702, pushing the ratchet 702 to rotate clockwise. The ratchet 702 drives the first bevel gear 703 to rotate through the transmission shaft 701. The first bevel gear 703 engages the second bevel gear 704. The second bevel gear 704 rotates counterclockwise and drives the sample storage shaft 801 to rotate 60° through the rotating column 802. The tray 803 also rotates 60° and leaves the bottom of the drill bit 406.

[0063] Then, the rotation of the sample storage shaft 801 also drives the screw rod 901 to rotate. The screw rod 901 is threadedly connected to the connecting block 902. The connecting block 902 descends and drives the probe 903 to enter the surface layer to detect humidity, temperature and other factors to provide environmental factor data for compaction detection.

[0064] Then, after the sampling of the surface layer is completed, the sampling tube 403 rises again, driving the first pawl 604 to engage the ratchet 702 and pull the ratchet 702 to rotate clockwise again. At this time, after the drill bit 406 is reset, the tray 803 rotates 60° again and moves to the bottom of the drill bit 406 to wait for the sample to be obtained. At this time, the probe 903 also enters the base layer. After repeating the above process for three samplings, the stroke of the probe 903 is from the surface layer to the base layer to the subbase layer, and then resets to the subbase layer to the base layer to the surface layer. The driving mechanism 6 follows the six stages of the probe 903 in the process of three samplings, and finally resets after the sampling is completed.

[0065] Finally, after acquiring the environment of three different layers, probe 903 can obtain data such as temperature gradient and moisture content to provide environmental data support for detecting compaction.

[0066] Compared with related technologies, the sampling device for detecting the compaction of roadbed and pavement provided in this embodiment has the following beneficial effects:

[0067] By setting a pneumatic suction cup 12, the position can be fixed when the equipment is working to avoid sampling failure caused by movement. By setting a limiter 10 to stabilize the drill bit 406, it is avoided that it shakes when the cylinder 404 pushes the sample into the tray 803. During the sampling process, the limiter 10 limits the sampling tube 403 to avoid shaking during the sampling process. By setting the first pawl 604 and the second pawl 605, they respectively engage the ratchet 702 during the lifting process to drive the tray 803 to rotate and drive the probe 903 to reset. During the three sampling processes, the probe 903 is reset after performing three-layer mapping, which provides environmental factor support for the detection of compaction degree. The environmental factors are obtained synchronously with the sampling process to obtain results in real time, avoiding errors caused by too long a time interval between sampling and mapping, which is beneficial to the accuracy of detection.

[0068] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sampling device for testing the compaction of roadbed and pavement, comprising a chassis, four wheels fixedly mounted on the bottom of the chassis, a load-bearing plate fixedly mounted on the top of the chassis via a frame box, two handles fixedly mounted on one side of the frame box, characterized in that: Also includes: a lifting mechanism fixedly mounted on the top of the carrying plate; A sampling mechanism, wherein the sampling mechanism is fixedly mounted on the bottom of the lifting mechanism, the sampling mechanism comprises a motor cylinder, the motor cylinder is fixedly mounted on the bottom of the lifting mechanism, a sampling motor is fixedly mounted on the top of the inner wall of the motor cylinder, the output shaft of the sampling motor passes through the bottom of the motor cylinder and extends to the outside, the output shaft of the sampling motor is fixedly connected to the sampling cylinder, a cylinder is fixedly mounted on the top of the inner wall of the sampling cylinder, a push plate is fixedly mounted on the output end of the cylinder, a drill bit is fixedly mounted on the bottom of the sampling cylinder, and openings for the drill bit to pass through are provided on the surfaces of the chassis and the bearing plate, and the lifting mechanism is used to drive the motor cylinder to lift and reciprocate; A sample storage mechanism is rotatably mounted inside the supporting plate. The sample storage mechanism includes a sample storage shaft, which is rotatably mounted inside the supporting plate. A rotating column is fixedly mounted on the top end of the sample storage shaft, and a bottom end of the sample storage shaft is rotatably mounted inside the chassis. Three trays are fixedly mounted on the surface of the sample storage shaft via a bracket.

2. A sampling device for detecting the compaction of roadbed and pavement according to claim 1, characterized in that: The lifting mechanism includes a lifting motor, which is fixedly installed on the top of the supporting plate. The output shaft of the lifting motor is fixedly connected to a screw, and the screw is slidably connected to an auxiliary rod through the lifting plate. The auxiliary rod is fixedly installed on the top of the supporting plate, the screw is threadedly connected to the lifting plate, and the auxiliary rod is slidably connected to the lifting plate. The top end of the screw is fixedly installed on the top of the supporting plate through a rotating frame, and the bottom of the lifting plate is fixedly installed on the top of the motor barrel.

3. The sampling device for detecting the compaction of roadbed and pavement according to claim 1, characterized in that: A sampling port is provided on one side of the frame box, and the sampling port is used for staff to take out samples.

4. The sampling device for detecting the compaction of roadbed and pavement according to claim 1, characterized in that: A driving mechanism is fixedly installed on the top of the supporting plate, and the driving mechanism includes a pillar. The pillar is fixedly installed on the top of the supporting plate. A sliding groove is provided on the surface of the pillar. The sliding groove is slidably connected to a slider through a connecting column. A first pawl and a second pawl are rotatably installed on both sides of the slider through two rotating shafts, and a tension spring is arranged between the first pawl and the second pawl.

5. The sampling device for detecting the compaction degree of roadbed and pavement according to claim 4, characterized in that: A transmission mechanism is fixedly installed on the top of the supporting plate, and the transmission mechanism includes a transmission shaft, which is fixedly installed on the top of the supporting plate through a rotating frame. A ratchet is fixedly installed on the right end of the transmission shaft, and the ratchet is engaged with the first pawl and the second pawl. A first bevel gear is fixedly installed on the left end of the transmission shaft, and a second bevel gear is fixedly installed on the surface of the rotating column, and the first bevel gear is engaged with the second bevel gear.

6. The sampling device for detecting the compaction degree of roadbed and pavement according to claim 4, characterized in that: A fixing plate is fixedly installed on the surface of the sampling cylinder, and the fixing plate is fixedly connected to a push column via a compression spring.

7. The sampling device for detecting the compaction of roadbed and pavement according to claim 6, characterized in that: The pushing end of the pushing column is semi-spherical, and the pushing column is adapted to be installed with the connecting column.

8. The sampling device for detecting the compaction degree of roadbed and pavement according to claim 1, characterized in that: Two limiting members are symmetrically fixedly installed on the bottom of the supporting plate, and the two limiting members are adapted to be installed with the drill bit and the sampling tube.

9. The sampling device for detecting the compaction of roadbed and pavement according to claim 1, characterized in that: Six pneumatic suction cups are symmetrically fixedly installed on the bottom of the chassis, and the pneumatic suction cups are lifted and lowered by telescopic rods.

10. The sampling device for detecting the compaction degree of roadbed and pavement according to claim 1, characterized in that: A through hole is opened inside the sample storage shaft, and a probe mechanism is fixedly installed on the top of the inner wall of the sample storage shaft. The probe mechanism includes a screw rod, which is fixedly installed on the top of the inner wall of the sample storage shaft. The surface of the screw rod is threadedly connected to a connecting block, and the connecting block is fixedly connected to the probe through four fixing columns.

Images